Blade feed for honing machines



March 8, 1932. c, SHEEHAN 1,848,204

BLADE FEED FOR 110mm MACHINES Filed Feb. 7, 1930 FIG.|

ATTORNEY Patented Mar. 8, 1932 I stares Pars-NT oFr-Icr.

THOMAS C. SHEEHAN, OF UPPER MONTCLAIR, JERSEY,I.ASSIGNOR 'T'O DURHAM DUPLEX RAZOR COMPANY, A CORPORATION OF NEW- YOR-K' BLADE FEED non nonnve MACHINES Application filed February 7, 1930. Seria1No 426A7 7. I i

This invention relates to an improvement in blade feeds for honing machines and the like, particularly those used in the manufacture of slotted safety razor blades. In such machines a stack of the blades is commonly supported on an arbor extending through the slot in the blades, and these blades are taken from the stack one by one by lugs on a moving blade forwarding device adjacent the foremost blade in the stack. An example of a blade feed of the type that the present invention is designed to improve is shown in Patent No. 1,166,012 to T. C. Sheehan, dated December 28,1915, particularly in'Figs- 5 and 6. 7 Trouble has resulted in such devices through binding or hanging up of the blades on the arbor due apparently to friction be tween the arbor and the slot surface of the blades when the blade skews or tilts out of 2 perpendicular to the arbor. As a result the blade is not pushed fully forward against the forwarding device but is held back a little, permitting the rapidly traveling lugs on the forwarding device to strike the inclined face of the blade beyond the end of the slot. This breaks the blade and results in serious losses.

It has been discovered that the above difficulty can be avoidedin the type of blade which has salients extending into the slot by.

provlding channel sections 1n the feed arbor in which the salients ride so that the blades are supported at several points of contact by the salients and the blade is otherwise free from engagement with the arbor.

It is therefore the main object of the'present invention to provide a better blade feed,relatively free from the above defect, carrying this discovery into effect. With this and other objects in view the invention consists in certain constructions and combinations hereinafter fully described and then particularly pointed out inthe appended claim.

In the accompanying drawings in which like characters of referenceindicate the same or like parts, Figl'is a plan view partly broken away of a blade feed constructed in accordance with the invention; Fig- 2 is a side elevation partly in section on the line 2-2 of Fig. 1. V a In carrying the inventioninto effect, there is provided in a blade feed for, honing machines, a blade supportingarbor having oppositely disposed blade engaging sections adja'cent its sides, and a blade havingsection engaging salients and otherwise free from engagement with said arbor in order" to pro:

vide a relatively frictionless contact between the blade and arbor. In the best constructions, such sections include channels, and

said salients have channel engaging knife edges.

l Referring now to the drawings, the blades 5 to be fed, Fig. 2, are provided with. slots 6 for admitting the studs or rib bywhich the 1 blades are positioned ina holder for use in shaving. The blades illustrated are adapted for use either in the well known type ofholder (not shown) which has aplurality of spaced studs with each two oppositely disposed pairs of salients 7 engaging the studs in the same way that they engage the lugs 11 inthe device disclosed, or may be used in an other well known type of holder having an axial rib, the tips of the opposed salients being spaced apart the width of the rib.

The arbor 8 on which the blades are slidable toward the feed belt 10 is provided with tapered channels 9 having rounded or concave base portions and extending longitudinally of the arbor. The salients?" are of triangular shape with the points or short knife edges thereof resting onthe concave 'base of the channels when the blades are stacked on the arbor. The arbor is afiat bar ,gagement therewith. It will be noted that the engagement between the salients and the channels is like that between the pivot and loop of a weighing balance andconsequently that the contacting surface is very small.

Gil

Thus the blades will slide smoothly with relatively little friction and without theliability of binding or hanging on the. arbor, to-

ward takeoff positon. The blades are yieldingly urged toward thebeltlO by any suitable means such as that disclosed in the above noted patent, or by gravity, consequently after the takeofi of one blade from the stack the next blade will be pushed fully forward to the position shown in Fig. 1 with the front end of the blade against the belt and the rear 5 end of the blade against the stop 12. One of the ln s 11 will then, in the arcuate travel of the be t on the pulley 13, enter the slot and squarely engage the forward end of the slot and carry the blade out between the 10 guides 14 and 15. Owing: to thev anti 'fric-v tion point or edge contact of the salientswith the arbor-grooves the blades will slide easily along the arbor even though the blades have swung somewhat from perpendicular posi- 15 tion with respect to the arbor. Hence more perfeot feeding andfewer broken bladeswill result at. this critical point in the blade feed.

' "What, is Claimedfis:

In a blade jfeed for honing machines,,a n 2 arbor for supporting slotted razor blades of'the type having salients on the. slots edge, m i in lleoselyfi n the slot a having longitudinalgrooyes for'receii in the salients I and thereby supporting the bide, saidslots beingshaped to engage the salients at one point only to providea relatively fricgionless eontaot between theblade andsaid :In' testimony whereof I have signed my name to this specification. i

it CVSHEEHAN. 

